[antlr-interest] Re: a new paper on ANTLR style grammars

[lgcraymer]

--- In antlr-interest at yahoogroups.com, Terence Parr <parrt at c...> wrote:
...
> So, the actions are the problem for everyone :)

Trees!  Trees! Ya gotta have trees.  Then actions aren't a problem.  One real strength of a multi-pass recognizer is that you separate 
syntactic analysis (parsing) from semantic interpretation (actions).  Once you have gotten to a canonical tree, the recognizer has only 
one token of lookahead so that actions always follow a (possibly semantically predicated) syntactic decision rather than being a part 
of it.

Cheers!

--Loring

> 
> Ter
> --
> Professor Comp. Sci., University of San Francisco
> Creator, ANTLR Parser Generator, http://www.antlr.org
> Co-founder, http://www.jguru.com
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